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by Tom Harris

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Please copy/paste the following text to properly cite this HowStuffWorks article:

Harris, Tom.  "How Hearing Works"  30 March 2001.  HowStuffWorks.com. <http://science.howstuffworks.com/environmental/life/human-biology/hearing.htm>  10 February 2012.
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Inside this Article
  1. Introduction to How Hearing Works
  2. Catching Sound Waves
  3. The Eardrum
  1. Amplifying Sound
  2. Fluid Wave
  3. Hair Cells
  4. See more »
    1. Lots More Information
    2. See all Human Biology articles

Lots More Information

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    Lee Majors Hearing Instrument The Lee Majors Bionic Ear Hearing Device is a hearing instrument that fits inside the ear designed for mild to moderate hearing loss. This innovative hearing device utilizes rechargeable batteries that last up to 10 hours and comes with a compact charging case that can fit in your pocket or purse. When the battery gets low, simply insert the hearing instrument into its charging case and plug the case into a standard electrical outlet. Don't worry if theres no electrical outlet near you, the hearing device can also be charged using AAA batteries if needed. With each purchase, you will receive 1 rechargeable hearing device (ear piece only), 1 set of ear caps in 5 various sizes and 2 different styles and 1 cleaning price. The charging case is lightweight and compact and features dual charging slots so you can always have an extra hearing device ready. According to the NIDCD (National Institute on Deafness and Other Communication Disorders) only 20 percent of people who can benefit from a hearing device actually wear one. At this low price you owe it to yourself to experience the benefits from a hearing device. Buy yours from ActiveForever.com! Bionic Hearing Device Features: Lasts up to 10 hours on a single charge Ease and convenience in one affordable package Fits inside the outer ear Affordable and durable hearing device Lasts over 500 charges Easy to clean and maintain Bionic Ear Sound Amplifier Specifications: Standard Frequency: 1600Hz Battery current: Below 0.8 mA / 2.5 V Max. output sound level gain: 295 dB 0~29 dB Battery type: Button size Cobalt-Titanium-Lithium rechargeable battery Highest sound pressure level for input SPL 90dB: 1185 dB below 125 dB Battery life expectancy: Continuous use 6-10 hours per charge; 500+ recharges Equivalent input noise level: Below 29 dB Hearing Device: 0.41" L x 0.57" W x 0.94" H Total harmonic distortion value: 1600Hz below 3%; 800Hz below 4%; 500Hz below 4% Charging Case: 3.78" L x 2.87" W x 1.18" H Warranty: 1 year standard Returns: Due to the hygiene or rehabilitation nature of this product, it is non-returnable. Please refer to ActiveForever's return policy for more detailed information. Related Searches: hearing help, hard of hearing

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